Locking device for armature oil-guards.



N0. 654,39l. Patentedluly 24, I900.

A. J. GAIRING. LOCKING DEVICE FOR ARMATUBE, OIL GUARDS.

(Application filed am. as, 1390.

(No Model.)

- K ATTORNEY.

rrnn Tans ALFRED J. GAIRING, OF JOHNSTOWN, PENNSYLVANIA, ASSIGNOR TO THE LORAIN STEEL COMPANY, OF PENNSYLVANIA.

LOCKING DEVICE FOR ARMATU RE OIL-G UARDS.

SPECIFICATION forming part of Letters Patent No. 654,391, dated July 24, 1900.

Application filed December 28,1899. Serial No. 741,812. (No model.)

To aZZ whom it may concern.-

Be it known that I, ALFRED J. GAIRING, of Johnstown, in the county of Oambria and State of Pennsylvania, have invented a new and useful Improvement in Looking Devices for Armature Oil-Guards, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, which form a part of this specification. My invention has relation to a locking device for the oil-guards of electric motors and dynamos and for other purposes, and is particularly designed for use in motors and dynamos wherein the oil-guards are in the form of separate removable sleeve members .which are secured around the armature-shaft intermediate the shaft-bearings and the arma ture-heads and are overhung by the commutator or by the end extension of thearmature- 2o winding. Inasmuch as these overhanging parts, particularly in small machines, are of small internal diameter the guards are not accessible to the application of ordinary looking devices, and considerable trouble has been experienced in shop practice in properly securing them in place. It is a matter of considerable importance that they be securely fastened, since if they become loose and work endwise toward the shaft-bearings they may 0 lock the armature between the said bearings and result in its destruction. On the other hand, they must be capable of being readily removed when desired to permit access to other parts of the armature and its commu- 3 5 tator.

The present invention is designed to provide means of simple and efficient character for securing the above-stated results and which may also be used to advantage in other classes of machines where it becomes necessary to secure one small part to another at a point which is difficult of access.

q With this object in View the invention consists in the novel device and in the novel construction and combination of parts, all as hereinafter described, and pointed out in the appended claims, reference being bad to the accompanying drawings,'in which- Figure 1 is a view, partly in side elevation and partly in longitudinal vertical section, of

the commutator end portion of an electric motor of the railway type having my invention applied thereto; and Fig. 2 is a detail view of the locking device detached. Fig. 3 is a detail view showing the device seated. In the drawings, the letter A designates the armature-shaft; B, the armature-body having a the head B; O, the commutator; O, the commutator-clamp; D, the motor-frame, and E the shaft-bearing. These parts may be constructed in any usual or well-known manner,,as my invention does not relate thereto. G designates the oil-guard, which consists of a sleeve having a flared or bell-shaped guard end. This sleeve in the present instance is threaded onto the extended hub portion B of the head B and against the end of the com mutator-clamp O, which it locks in place. At the other end of the motor the corresponding guard is usually driven to its seat on the hub of the other head. This, however, is not material to my invention.

The purpose of these guards, as is well known, is to prevent lubricant from the oilwells or lubricant-reservoirs in which the guard ends are seated from working back onto the armature.

, H designatesmy improved locking device, which consists of an oblique steel pin having at its upper end an extended arm or head H, provided with a perforation 77. near its end, said pin and arm forming an obtuse angle with each other. To receive this pin, a hole is drilled obliquely through the guard-sleeve G in the hub B and the pin is inserted therein to its full length, which can be readily done notwithstandingithe overhanging end portion of the commutator. To seat the arm H, whose outer end preferably extends to a point somewhat beyond the end of the commutator, the sleeve may be slightly planed out to form a recess. The sleeve portion of the guard G is also formed with a throughperforation which registers with the perforation in the arm 11, and after the pin has been 9 '5 properly seated a small rivet I, of copper or some other soft material, is passed up through the registering perforations from within the sleeve and its upper end subsequently upset. When for any reason it is desired to remove the oil-guard, the head of this rivet can be readily cut off and the pin removed.

It is obvious that the shape of the pin and the arrangement of the parts may be varied in detailwithout departing from my invention. Hencel do not wish to be limited to the exact construction and arrangement which I have herein shown and described.

The motor shown is an ordinary railwaymotor having its frame D constructed in two sections, the line of division being at right angles to the plane of the section shown in Fig. 1 and hidden by the armature.

Having thus described my invention, what I claim, .and desire to protect by Letters Patent, is

1. The herein-described locking device,

consisting of an oblique pin having an extended arm forming a head therefor, and a perforation in said arm, substantially as described.

2. The combination of a sleeve member, and a member upon which said sleeve member is seated, said sleeve member having an oblique hole extending through it into its seating member, and a pin seated in said hole and having an extended arm which seats on said sleeve member and is secured thereto, substantially as described.

3. The combination of a sleeve member and a member upon which the sleeve member is seated, said sleeve member having an oblique hole extending through it into the seating member, a pin seated in said hole and having an extended arm or head which seats on the sleeve member, and means for securing said arm or head to the said sleeve member, substantially as described.

4.. In a dynamo-electric machine, the combination with the armature having an overhanging portion, of an oil-guard extending underneath said overhanging portion, a pin extending obliquely through said guard into the armature member upon which the guard is seated, said pin having a head portion which extends beyond the said overhanging portion and which is secured to said sleeve, substantially as described.

In testimony whereof I have affixed my signature in presence of two witnesses.

ALFRED J. GAIRING.

Witnesses:

MYRTLE E. SHARPE, H. W. SMITH. 

